diff --git a/Tests/Schema/VariablesTest.php b/Tests/Schema/VariablesTest.php
index 334fe4e6..53e2b016 100644
--- a/Tests/Schema/VariablesTest.php
+++ b/Tests/Schema/VariablesTest.php
@@ -37,11 +37,27 @@ public function testInvalidNullableList()
         $processor->processPayload(
             'query getList($ids: [ID!]) { list(ids: $ids) }',
             [
-                'ids' => [1, 12, null]
+                'ids' => [1, 12]
             ]
         );
         $this->assertEquals(['data' => ['list' => 'item']], $processor->getResponseData());
 
+        $processor->getExecutionContext()->clearErrors();
+        $processor->processPayload(
+            'query getList($ids: [ID!]) { list(ids: $ids) }',
+            [
+                'ids' => [1, 12, null]
+            ]
+        );
+        $this->assertEquals(['data' => ['list' => null], 'errors' => [
+            [
+                'message' => 'Not valid type for argument "ids" in query "list"',
+                'locations' => [
+                    ['line' => 1, 'column' => 35]
+                ]
+            ],
+        ]], $processor->getResponseData());
+
         $processor->getExecutionContext()->clearErrors();
         $processor->processPayload(
             'query getList($ids: [ID]) { list(ids: $ids) }',
diff --git a/src/Validator/ResolveValidator/ResolveValidator.php b/src/Validator/ResolveValidator/ResolveValidator.php
index 2759fb6f..a3b30b15 100644
--- a/src/Validator/ResolveValidator/ResolveValidator.php
+++ b/src/Validator/ResolveValidator/ResolveValidator.php
@@ -50,7 +50,7 @@ public function assertValidArguments(FieldInterface $field, AstFieldInterface $q
                 case TypeMap::KIND_SCALAR:
                 case TypeMap::KIND_INPUT_OBJECT:
                 case TypeMap::KIND_LIST:
-                    if (!$argument->getType()->isValidValue($argumentType->parseValue($astArgument->getValue()))) {
+                    if (!$argument->getType()->isValidValue($astArgument->getValue())) {
                         $error = $argument->getType()->getLastError();
                         throw new ResolveException($error ? $error : sprintf('Not valid type for argument "%s" in query "%s"', $astArgument->getName(), $field->getName()), $astArgument->getLocation());
                     }